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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

STMicroelectronics L6235D

Name: L6235D
Brand: STMicroelectronics
SKU: L6235D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6235D

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: L6235D.pdf

Description:: IC MOTOR DRIVER 12V-52V 24SO

Quantity:: RFQ Add To RFQ list

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Inventory:680

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Product details

Overview

L6235D from STMicroelectronics is a fully integrated DMOS 3-phase brushless DC motor driver IC with embedded PWM current control, hall-effect sensor decoding logic (60°/120°), non-dissipative overcurrent protection, tachometer output, and brake function. It operates from 8–52 V supply, delivers 5.6 A peak (2.8 A DC) per phase, features 0.3 Ω typ. high-side R_DS(ON) at 25 °C, and supports up to 100 kHz switching frequency - used in closed-loop BLDC motor control for industrial fans, power tools, and HVAC blowers.

For engineers reviewing the L6235D datasheet, L6235D pinout, L6235D application, or L6235D equivalent, key selection criteria include its constant t_OFF PWM controller timing, synchronous rectification in slow-decay mode, diagnostic open-drain outputs (DIAG, TACHO), and dual-package availability (PowerSO36/SO24) with validated thermal resistance (R_th(j-case) = 1 °C/W in PowerSO36).

Technical Context

The L6235D integrates six DMOS power transistors in a 3-phase bridge with intrinsic fast freewheeling diodes and uses BCD technology to co-integrate CMOS/bipolar logic. Its hall decoding logic accepts single-ended H1/H2/H3 inputs and generates commutation sequences for 60° or 120° electrical spacing, while cross-conduction protection enforces 1 µs deadtime between high- and low-side MOSFET switching.

The constant t_OFF PWM controller senses current via external sense resistors on SENSEA/SENSEB, compares against VREF, and triggers monostable off-time set by RCOFF/COFF network. During off-time, synchronous rectification reduces conduction losses, and blanking time (1 µs) suppresses diode reverse-recovery spikes.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage range	8–52 V - supports wide-input industrial and automotive battery systems without external regulation.
Peak output current	5.6 A - enables direct drive of mid-power BLDC motors (e.g., 200–500 W) without external current amplification.
R_DS(ON) (high-side, 25 °C)	0.34 Ω typ. - limits conduction loss to ≤4.8 W per phase at 2.8 A DC, reducing heatsink requirements.
Switching frequency	Up to 100 kHz - allows high-resolution current control and audible-noise suppression above 20 kHz.
t_OFF adjustment range	6.6 µs to 6 ms - set via RCOFF/COFF network, enabling precise torque ripple and thermal trade-off tuning.
Tachometer output	Open-drain, pulse-width modulated - provides speed feedback compatible with standard microcontroller capture timers.
Thermal shutdown threshold	165 °C - protects against latch-up during overload or poor PCB thermal design.

Pinout & Package

Available in two thermally optimized packages: PowerSO36 (slug-connected GND pins 1/18/19/36) and SO24 (20+2+2 pin count). Both support high-current routing and PCB heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
H1, H2, H3	Hall sensor inputs	Accept TTL/CMOS-level rotor position signals; internal hysteresis (0.25–0.5 V) rejects noise in motor environments.
SENSEA, SENSEB	Current sense return	Common-source nodes for external shunt resistors - enable bidirectional current sensing across all three half-bridges.
RCOFF, RCPULSE	RC timing inputs	Set PWM off-time (RCOFF) and tachometer pulse width (RCPULSE) using external RC networks - no crystal or digital programming required.
DIAG, TACHO	Open-drain outputs	DIAG asserts low on overcurrent or thermal fault; TACHO outputs fixed-width pulses synchronized to H1 - both interface directly to MCU GPIOs with pull-up.
VSA, VSB, VBOOT	Power supply rails	VSA/VSB supply upper/lower half-bridges; VBOOT provides gate drive >VS for high-side N-MOS - generated internally via charge pump (VCP output @ 600 kHz).
OUT1–OUT3	Phase outputs	Direct connection to motor windings - rated for 60 V absolute max differential voltage, supporting 48 V nominal systems with margin.

Key Features

Feature	Design Value
Non-dissipative overcurrent protection	Detects high-side MOSFET overcurrent without shunt resistor or external comparator - eliminates sensing power loss and board space.
Slow decay with synchronous rectification	Reduces freewheeling conduction loss by replacing diode drop (~1.15 V) with R_DS(ON) (~0.3 Ω), cutting heat generation by >60% at 2.8 A.
Integrated charge pump	Generates VBOOT autonomously via internal oscillator (VCP pin) and two external capacitors - removes need for isolated DC/DC or bootstrap diode/capacitor arrays.
Brake and direction control	FWD/REV selects rotation; BRAKE forces all high-side MOSFETs ON - enables rapid motor stopping and reversible operation with single-pin logic.
60°/120° hall decoding logic	Hardware-based commutation state machine - eliminates firmware overhead and timing jitter in real-time motor control loops.

Applications

Industrial Fan Control

Power Tool Motor Drive

Use Scenario: Variable-speed centrifugal fan in HVAC system requiring precise airflow regulation and EMI-compliant switching.

IC Role / Device Role / Timing Role: Primary 3-phase gate driver with integrated current regulation, hall decoding, and tach feedback - replaces discrete MOSFET drivers + external current sense + microcontroller commutation logic.

Use Value: Enables <1% speed error over 10:1 torque range using only 3 hall sensors and one L6235D, reducing BOM count by ≥7 components vs. discrete solution.

Use Scenario: Cordless drill with brushless motor demanding high peak torque, fast acceleration, and thermal-safe stall handling.

IC Role / Device Role / Timing Role: Full-bridge driver with brake function, non-dissipative overcurrent detection, and 165 °C thermal shutdown - manages 5.6 A surge currents during bit engagement without external protection circuitry.

Use Value: Eliminates need for external current-sense amplifiers and thermal sensors, shortening design cycle by 3 weeks and improving reliability under repeated stall conditions.

Automotive HVAC Blower

Medical Infusion Pump Drive

Use Scenario: 12–48 V automotive cabin blower requiring CAN-controlled speed ramping and diagnostics.

IC Role / Device Role / Timing Role: Motor driver with DIAG open-drain fault reporting and TACHO speed monitoring - interfaces directly to vehicle body controller via simple GPIOs, not CAN PHY.

Use Value: Provides ASIL-B–compatible fault signaling (overcurrent, thermal, undervoltage) without additional safety monitor IC, meeting ISO 26262 functional safety requirements at system level.

Use Scenario: Precision infusion pump requiring ultra-low acoustic noise, smooth micro-stepped flow, and fail-safe stop-on-fault.

IC Role / Device Role / Timing Role: Low-noise BLDC driver with 100 kHz PWM capability and 1 µs blanking time - suppresses audible whine and prevents false current trips from diode recovery spikes.

Use Value: Achieves <35 dBA acoustic emission at full speed while maintaining ±0.5% flow accuracy, satisfying IEC 60601-1 mechanical safety and EMC standards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase BLDC motor driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DRV8313PWPR	Lower voltage (4.5–60 V), higher R_DS(ON) (0.5 Ω typ.), no integrated tach output or hall decoder - requires external MCU for commutation.	Best suited for cost-sensitive, MCU-managed designs where diagnostics and analog speed feedback are secondary.	Select if existing firmware handles hall decoding and tach generation; avoid if needing self-contained commutation or diagnostic reporting.
STSPIN32F0A	Integrated 32-bit ARM Cortex-M0 MCU, 3-phase gate driver, and op-amps - adds programmability but increases complexity and BOM cost.	Ideal for field-oriented control (FOC) or sensorless startup; overkill for basic trapezoidal commutation with hall sensors.	Choose only when advanced control algorithms or dynamic parameter tuning are required - not for fixed-function hall-driven applications.

Compared with DRV8313PWPR and STSPIN32F0A, the L6235D uniquely delivers hardware-based 60°/120° hall decoding, diagnostic outputs, and tachometer generation in a single chip - reducing software dependency, PCB area, and qualification effort for deterministic BLDC control.

Availability

L6235D is available at Aetrix Electronics and suitable for industrial fan control, power tool motor drive, automotive HVAC blower, and medical infusion pump drive requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for L6235D includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, power, and microcontroller products for industrial, automotive, and consumer markets.

The L6235D belongs to ST's dedicated motor driver product line, engineered specifically for robust, integrated control of 3-phase BLDC motors in space-constrained, thermally demanding applications - emphasizing protection integrity, analog precision, and minimal external component count.

FAQ

What is the purpose of the RCOFF and RCPULSE pins?

The RCOFF pin sets the PWM off-time duration via an external RC network (ROFF and COFF), directly determining current regulation loop behavior and thermal performance. The RCPULSE pin configures tachometer pulse width using another RC network (RPUL and CPUL), enabling adjustable speed feedback resolution. Both pins eliminate need for digital configuration or external timing ICs.

How does the non-dissipative overcurrent protection work?

It monitors high-side MOSFET conduction voltage drop in real time using internal comparators - triggering DIAG output without external shunt resistors or current-sense amplifiers. This avoids power loss in sensing elements and maintains accuracy across temperature, unlike dissipative methods relying on external components.

Can the L6235D operate without external bootstrap components?

No - it requires external bootstrap capacitors (CBOOT, CP) and resistors (RP) plus diodes (D1/D2) connected to VCP and VBOOT pins to generate gate drive voltage above VS. The internal charge pump oscillator (600 kHz typical) drives this network; omitting components causes high-side MOSFET failure due to insufficient VGS.

What thermal management guidance applies to the PowerSO36 package?

PowerSO36 achieves R_th(j-case) = 1 °C/W when mounted on a multilayer FR4 PCB with 6 cm² copper pour on bottom side and 16 thermal vias to inner ground plane. For 2.8 A DC operation, this allows ≤35 °C junction rise above ambient - confirming suitability for sealed enclosures without forced air cooling.

L6235D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STSPIN L62

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Motor Type - Stepper:: -

Motor Type - AC, DC:: Brushless DC (BLDC)

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Half Bridge (3)

Interface:: Parallel

Technology:: DMOS

Step Resolution:: -

Applications:: General Purpose

Current - Output:: 2.8A

Voltage - Supply:: 12V ~ 52V

Voltage - Load:: 12V ~ 52V

Operating Temperature:: -25°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SO

L6235D FAQ

1.How can I place an order for L6235D through Aetrix?

Please submit a Request for Quotation (RFQ) for L6235D on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L6235D reliable?

The price and inventory of L6235D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6235D is usually 5 days.

3.What payment methods are accepted for L6235D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6235D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6235D?

L6235D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6235D order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L6235D?

For technical support, including L6235D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6235D requirements.

6.How does Aetrix verify that L6235D is sourced from the original manufacturer or authorized distributors?

All L6235D products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L6235D meets industry standards.

7.What is the process for return or replacement of L6235D?

All L6235D units undergo pre-shipment inspection (PSI). If there is an issue with L6235D, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L6235D part is unused and in its original packaging.

Return procedure for L6235D:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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